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发表于 2011-6-30 22:32:35
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The internal microphone amplifier has gain for recording. The VMIC pin is the power supply (2.2V)
for microphone.
The audio ADC is an 18 bits sigma delta Analog-to-Digital Converter. Its input source can be
selected from MIC amplifier or external FM or line-in, and it has two FIFO.
ATJ2085 has an 8-bit switched-capacitor SAR Analog-to-Digital Converter (SARADC). Its input
source is LRADC pin(for remote control), input range is 0.8-2.2V, and its FS can be 8K, 4K, 2K,
1K. In remote control,only the most significant 8 bits are used。 |
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